1.
Gustav Gröber an Hugo Schuchardt (072-04071)
2.
Otto Braun an Hugo Schuchardt (02-01309)
Gustav Gröber an Hugo Schuchardt (073-04072)
Hugo Schuchardt an Alessandro D´Ancona (15-HS_ADA_09)
Hugo Schuchardt an Graziadio Isaia Ascoli (001-B37_60)